Membrane Bioreactors (MBR) - Lessons Learned -Gordon Culp
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Lessons learned operating Membrane Bioreactors (MBR) in treatment of municipal wastewater
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Membrane Bioreactors (MBR) - Lessons Learned -Gordon Culp
- 1. MEMBRANE BIOREACTORS LESSONS LEARNED Gordon Culp Smith Culp Consulting Las Vegas, Nevada
- 3. LESSONS LEARNED Carefully select flux rate 10 gfd vs 25 gfd Changes in filterability hard to predict Run pilot tests
- 5. LESSONS LEARNED Balance MLSS with membrane limits 7,500 mg/L-10,000 mg/L Consider temperature effects 21C to 12 C, flux decrease of 29% based on temperature Consider filterability changes 21 C to 12 C in practice, flux decrease of 57% Run pilot tests!
- 6. LESSONS LEARNED Equalize Flow Cost and space tradeoff between more membranes and equalization 10 mgd example – 500,000 sf added membrane area vs 1.5 million gallons of equalization Savings in biological process design – no peak loads and flows Ease of operation
- 7. LESSONS LEARNED Provide right O&M skills Lots of moving parts moving all of the time Consider DBO? Talk to others using the same membranes Verify actual flux rates, not just design rates Quality of manufacturer support
- 8. LESSONS LEARNED Check State Design Requirements Flux rate limits – they are limits, not necessarily achievable Redundancy requirements Equalization requirements
- 9. LESSONS LEARNED Read the fine print MLSS limits (7,500-10,000 mg/L) Ammonia limits (1 mg/L) Minimum influent temperature Influent quality specification Flux rates - how many trains in service Flows – average, max mo, max week, peak hour Cleaning regimen
- 10. LESSONS LEARNED Plan for What Happens When the Membranes Can’t Keep Up Seattle Spokane County
- 11. The Sirens bewitch everybody who approaches them. There is no homecoming for the man who draws near them unawares. --The advice of Circe, Odyssey, 12:39-47
- 12. Be aware of the lessons learned so that the good ship MBR can chart a course through the rocks and have a happy landing.
- 13. MEMBRANE BIOREACTORS LESSONS LEARNED Gordon Culp Smith Culp Consulting Las Vegas, Nevada Gordon@smithculp.com